KR100947780B1 - Back light assembly for liquid crystal display - Google Patents

Abstract

A backlight assembly for a liquid crystal display device capable of stably fixing a U-shaped lamp and preventing sound vibrations is provided. The backlight assembly for a liquid crystal display includes at least one U-shaped lamp; A lamp housing in which the lamp is mounted; A side coupling member fastened to the lamp housing and having an insertion portion capable of inserting the lamp; And a lamp support member for supporting and fixing the lamp in the insertion portion of the side coupling member.

LCD, backlight, U-shaped lamp, side coupling member, lamp support member

Description

Backlight Assembly for Liquid Crystal Display {BACK LIGHT ASSEMBLY FOR LIQUID CRYSTAL DISPLAY}

1 is an exploded perspective view of a liquid crystal module having a backlight using a general U-shaped lamp.

2 is a view illustrating a backlight assembly in which a U-shaped lamp according to the related art is mounted.

3 is a view illustrating inserting the U-shaped lamp of FIG. 2 into an insertion portion formed in the side coupling member.

4 is a view illustrating a backlight assembly to which a U-shaped lamp is mounted according to an exemplary embodiment of the present invention.

5 is a view showing the insertion of the U-shaped lamp according to the embodiment of the present invention into the insertion portion formed in the side coupling member.

6A and 6B are diagrams for explaining a principle of supporting a U-shaped lamp according to an embodiment of the present invention, respectively.

7 is a view showing the insertion of the U-shaped lamp according to another embodiment of the present invention into the insertion portion formed in the side coupling member.

8 is an exploded perspective view of a liquid crystal module having a backlight using a U-shaped lamp according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

410: lamp housing 420: supporter side

421: lamp insertion part 422: plate

423: boss 430: U-shaped lamp

The present invention relates to a liquid crystal display device, and more particularly, to a backlight assembly for a liquid crystal display device having a U-shaped lamp.

The liquid crystal display adjusts the light transmittance of the liquid crystal using an electric field, thereby displaying an image corresponding to the video signal on the liquid crystal display panel. The passive light emitting display device is equipped with a backlight (back light) used as a light source behind the liquid crystal panel, and such a backlight is inefficient in terms of thickness, weight, and power consumption. .

In general, a so-called backlight used as a light source of a liquid crystal display is a method of disposing a cylindrical fluorescent lamp, which is divided into a direct type method and a light guide plate method.

In the direct type, the fluorescent lamp is placed on a flat surface. Since the shape of the fluorescent lamp appears on the liquid crystal panel, the gap between the lamp and the liquid crystal panel must be maintained, and the light scattering means must be arranged for the uniform distribution of light. There is a limit. In addition, as the panel is enlarged, the area of the light exit surface of the backlight is also increased. When the direct backlight is enlarged, the thickness of the light scattering means is not flat unless the light scattering means secures sufficient thickness. You must secure enough.

In the light guide plate method, a fluorescent lamp is installed outside and light is distributed to the entire surface by using the light guide plate, and a fluorescent lamp is installed on the side and light has to pass through the light guide plate, thereby having a low luminance. In addition, high optical design and processing technology for the light guide plate is required for uniform distribution of light intensity.

Since the direct type and the light guide plate have their own advantages and disadvantages, the direct type type backlight is mainly used in a liquid crystal display device in which brightness is more important than the screen thickness, and a thickness such as a notebook PC or a monitor PC is important. In the liquid crystal display device, a light guide plate type backlight is mainly used.

Meanwhile, a method of manufacturing a lamp having a U-shape has been recently developed. Since the U-shaped lamp has a close distance between electrodes, it is easy to measure a tube current and can measure an accurate luminance. .

1 is an exploded perspective view of a liquid crystal module having a backlight using a general U-shaped lamp.

Referring to FIG. 1, a general liquid crystal module includes a liquid crystal panel 100, a backlight assembly 150, a top cover 160, and the like as a whole.

The liquid crystal panel 100 includes a lower substrate 110, an upper substrate 120, a liquid crystal (not shown), a gate tape carrier package (TCP) 130, a gate printed circuit board 135, and data. TCP 140 and data printed circuit board 145.

The backlight assembly 150 includes an optical sheet 151, a diffusion plate 152, a support main 153, a U-shaped lamp 154, a reflecting plate 155, and the like.

The U-shaped lamp 154 irradiates light, and the reflecting plate 155 is installed under the lamp 154 to emit light emitted to the lower part of the lamp 154 toward the upper diffuser plate 152 of the reflecting plate 155. To reflect.

At this time, the light irradiated from the U-shaped lamp 154 and the light reflected by the reflecting plate 155 are diffused by the diffuser plate 152 to have the same brightness, and then focused by an optical sheet 151 such as a prism. .

In the internal space defined by the combination of the support main 153 and the bottom cover 170, the above-described components of the backlight assembly 150 are accommodated, and the bottom cover 170 is coupled to the top cover 160 again. Form a liquid crystal module.

On the other hand, Figure 2 is a view showing a backlight assembly in which the U-shaped lamp according to the prior art is seated, Figure 3 is a view showing the insertion of the U-shaped lamp of Figure 2 to the insertion portion formed in the side coupling member.

Referring to FIG. 2, the backlight assembly in which the U-shaped lamp according to the related art is mounted may include a lamp housing 210, a supporter side 220, and a U-shaped lamp 230. . Here, although the backlight assembly illustrated in FIG. 1 includes the optical sheet 151, the diffuser plate 152, the support main 153, and the reflector plate 155, the lamp housing 210 and the side surface of FIG. Only the coupling member 220 and the U-shaped lamp 230 will be described.

As shown in FIG. 2, in the backlight assembly in which the U-shaped lamp according to the related art is mounted, the lamp housing 210 may be a bottom cover, and the side coupling member 220 may be one side of the lamp housing 210. When it is open, it is engaged with the lamp housing 210. At this time, the side coupling member 220 is configured to insert the U-shaped lamp 230, but does not fix the U-shaped lamp 230.

Specifically, referring to FIG. 3, when the U-shaped lamp 230 is directly inserted into and fixed to the side coupling member 220, the tolerance of the lamp 230 and the insertion portion 221 in the side coupling member 220 are fixed. There is a problem that the lamp 230 is not stably fixed by the tolerance. In particular, in the liquid crystal display of the TV model, there is a problem that the sound vibration (Sound Vibration) may occur in the lamp 230 by the sound generated from the speaker of the TV.

An object of the present invention for solving the above problems is to provide a backlight assembly for a liquid crystal display device which can stably fix the U-shaped lamp.

Another object of the present invention is to provide a backlight assembly for a liquid crystal display device for preventing sound vibration caused by a lamp in a liquid crystal display device of a TV model.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the backlight assembly for a liquid crystal display according to the present invention, at least one U-shaped lamp; A lamp housing in which the lamp is mounted; A side coupling member fastened to the lamp housing and having an insertion portion capable of inserting the lamp; And a lamp support member for supporting and fixing the lamp in the insertion portion of the side coupling member.

Here, the lamp support member is disposed on the upper side or the lower side in the insertion portion, a plate for supporting the lamp in contact with the upper or lower end surface of the inserted U-shaped lamp (Plate); And it may include a boss (boss) formed in the central portion of the plate.

Here, the plate is a tension bar having an elastic force, and the plate supports the lamp by providing tension on both sides of the lamp with the protrusion as the support shaft with respect to the inserted U-shaped lamp. It features.

Here, the protrusion may be formed integrally with the plate.

In addition, the liquid crystal module according to the present invention includes a liquid crystal panel in which a liquid crystal is injected between an upper substrate and a lower substrate; A backlight providing light to the liquid crystal panel; Light scattering means disposed between the backlight and the liquid crystal panel to provide light to the liquid crystal panel with a uniform distribution of light provided from the backlight; And a top cover engaged with the bottom cover in the backlight to protect the liquid crystal panel, wherein the backlight comprises one or more U-shaped lamps; A lamp housing in which the lamp is mounted; A side coupling member fastened to the lamp housing and having an insertion portion capable of inserting the lamp; And a lamp support member for supporting and fixing the lamp in the insertion portion of the side coupling member.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the present embodiments make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, the invention being defined only by the scope of the claims.

Hereinafter, a backlight assembly for a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a view illustrating a backlight assembly to which a U-shaped lamp is mounted according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the backlight assembly in which the U-shaped lamp is mounted according to an embodiment of the present invention includes a lamp housing 410, a side coupling member 420, and at least one U-shaped lamp 430. The insertion member 421 is formed at the side coupling member 420, and a plate 422 having a boss 423 formed therein is disposed in the insertion part. At this time, the plate 422 and the projection 423 is combined to serve as a lamp support member.

The U-shaped lamp 430 has a phosphor coated on an inner wall thereof, and an electrode (not shown), which is a conductor, is formed to electrically conduct at both ends of the U-shaped lamp. A power lead wire for transferring power for driving the lamp is connected to both electrodes of the lamp 430, and the power lead wire is connected to a separate connector and connected to the driving circuit. At this time, both electrodes of one lamp 430 are adjacent to each other, so that the power lead wire connected thereto is tied to one connector. As a result, the plurality of lamps 430 are arranged inside the bottom cover 410 which is a lamp housing to emit light.

The lamp housing 410 may be a bottom cover, and at least one U-shaped lamp 430 is seated. Substantially, a reflecting plate is disposed inside the bottom cover 410 to reflect the light provided from the U-shaped lamp 430, thereby increasing the efficiency of the light source.

The side coupling member 420 is fastened to the lamp housing 410 and has an insertion portion 421 into which the lamp 430 can be inserted.

The lamp supporting member serves to support and fix the lamp 430 in the insertion portion 421 of the side coupling member 420.

The lamp support member may include a plate 422 which is a tension bar having an elastic force and a boss 423 formed at the center of the plate 422.

5 is a view showing the insertion of the U-shaped lamp according to the embodiment of the present invention into the insertion portion formed in the side engaging member.

Referring to FIG. 5, the plate 422 is disposed below the insertion part 421 and serves to support the lamp 430 in contact with a lower end surface of the inserted U-shaped lamp 430. That is, the plate 422 provides the tension to both sides of the lamp 430 by using the protrusion 423 as a support shaft with respect to the inserted U-shaped lamp 430. Will be supported.

In this case, the protrusion 423 may be integrally formed with the plate 422.

6A and 6B are diagrams for explaining a principle of supporting a U-shaped lamp according to an embodiment of the present invention, respectively.

Referring to FIG. 6A, the lamp support member may include a tension bar plate 422 and a protrusion 423. Referring to FIG. 6B, when the lamp 430 is inserted and fastened to the bottom cover 410, the lamp support member may include a protrusion ( The tension bar 422 formed with the 423 is subjected to tension, and the lamp 430 is slightly overlapped and fastened to the side coupling member 420. Accordingly, since the lamp 430 is supported by the tension bar 422 disposed in the insertion portion 421, the vibration between the lamp 430 and the bottom cover 410 or the side coupling member 420. Can be prevented. That is, even when the tolerance between the lamp 430 and the insertion part 421 is taken into consideration, the lamp 430 may be stably fastened to the bottom cover 410 by tension.

The lamp support member may be formed of the same material as the side coupling member, but may be formed of another material having elasticity.

The lamps 430 are arranged in a line inside the bottom cover 410 to correspond to the position of the insertion part 421 of the side coupling member 420, and the lamp 430 is coupled to the lamp support member and the side. The insertion part 421 of the member 420 is inserted between the lower walls.

On the other hand, Figure 7 is a view showing the insertion of the U-shaped lamp according to another embodiment of the present invention to the insertion portion formed in the side coupling member.

Referring to FIG. 7, the plate 422 having the aforementioned protrusion 423 is disposed on the upper side as well as the lower side of the insertion portion 421 of the side coupling member 420. That is, the plate 424 having protrusions is disposed on the upper side of the insertion part 421 so that the lamp 430 can be more stably inserted into the insertion part 421.

On the other hand, Figure 8 is an exploded perspective view of a liquid crystal module with a backlight using a U-shaped lamp according to an embodiment of the present invention. For convenience, the reference numerals used in FIG. 4 and the reference numerals shown in FIG. 1 will be mixed.

Referring to FIG. 8, the liquid crystal module according to the exemplary embodiment of the present invention includes a liquid crystal panel 100, a backlight assembly 150, a top cover 160, and the like, as a whole. The backlight assembly 150 may include at least one U-shaped lamp 430; A lamp housing 410 on which the lamp 430 is seated; A side coupling member 420 fastened to the lamp housing 410 and having an insertion portion 421 into which the lamp 430 can be inserted; And a lamp support member that supports and fixes the lamp 430 in the insertion portion 421 of the side coupling member 420, wherein the lamp support member is disposed above or below the insertion portion 421. A plate 422 contacting the upper or lower end surface of the inserted U-shaped lamp 430 to support the lamp; And protrusions 423 formed at the center of the plate 422 are coupled to each other.

As shown, the backlight assembly of the liquid crystal display according to the exemplary embodiment of the present invention includes a plurality of lamps 430 that are U-shaped cold cathode fluorescent lamps (CCFLs).

The liquid crystal panel 100 includes a lower substrate 110, an upper substrate 120, a liquid crystal (not shown), a gate tape carrier package (TCP: 130), a gate printed circuit board (PCB: 135), and data TCP 140. And data PCB 145 and the like.

The lower substrate 110 includes a gate line, a data line, a thin film transistor, a pixel electrode, and the like, and the upper substrate 120 is positioned to face the upper substrate 110 and includes a common electrode and a color filter. This is not illustrated. In this case, the common electrode may be formed on the lower substrate 110 in the IPS mode.

The gate TCP 130 is connected to each gate line formed on the lower substrate 110, and the data TCP 140 is connected to each data line formed on the lower substrate 110.

The gate driving signal and the data driving signal can be processed in the gate PCB 135 and the data PCB 145 so that the gate driving signal can be input to the gate TCP 130 and the data driving signal can be input to the data TCP 140. Several circuit components are mounted.

The backlight assembly 150 includes an optical sheet 151, a diffusion plate 152, a support main 153, a U-shaped lamp 430, a reflecting plate 155, and the like.

That is, the U-shaped lamp 430 irradiates light, and the reflecting plate 155 is installed under the U-shaped lamp 430 to diffuse the light emitted to the lower part of the lamp 430 to the upper part of the reflecting plate 155. Reflect in the direction of the plate 152.

The light irradiated from the U-shaped lamp 430 and the light reflected by the reflecting plate 155 are diffused by the diffuser plate 152 to have the same brightness, and then focused by an optical sheet 151 such as a prism.

In the internal space partitioned by the combination of the support main 153 and the bottom cover 410, the components of the backlight assembly 150 described above are accommodated, and the bottom cover 410 is coupled to the top cover 160 again. Form the entire frame of the liquid crystal module.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive.

The backlight assembly for the liquid crystal display according to the present invention can stably fix the U-shaped lamp, and also does not need to use a lamp holder for preventing sound vibration, thereby reducing the material cost when manufacturing the backlight assembly for the liquid crystal display. It can reduce and improve workability.

Claims (14)

One or more U-shaped lamps; A lamp housing in which the lamp is mounted; A side coupling member fastened to the lamp housing and having an insertion portion capable of inserting the lamp; And A lamp support member for supporting and fixing the lamp in the insertion portion of the side coupling member; The lamp support member, A plate disposed at an upper side or a lower side of the insertion part and supporting the lamp in contact with an upper or lower end surface of the inserted U-shaped lamp; And Boss formed in the center of the plate Backlight assembly for a liquid crystal display comprising a. delete The method of claim 1, The plate is a backlight assembly for a liquid crystal display, characterized in that the tension bar (Tension Bar) having an elastic force. The method of claim 3, And the plate supports the lamp by providing tension on both sides of the lamp with the protrusion as the support shaft with respect to the inserted U-shaped lamp. The method of claim 1, And the protrusion is integrally formed with the plate. The method of claim 1, And the lamp is inserted into and fixed between an upper wall or a lower wall of the insertion portion of the lamp support member and the side coupling member. The method of claim 1, The lamp housing is a backlight cover for a liquid crystal display device, characterized in that the bottom cover (Bottom Cover) is open one side to be coupled to the side coupling member. The method of claim 7, wherein And the lamps are arranged in a line inside the bottom cover to correspond to the position of the insertion part of the side coupling member. A liquid crystal panel in which liquid crystal is injected between the upper substrate and the lower substrate; A backlight providing light to the liquid crystal panel; Light scattering means disposed between the backlight and the liquid crystal panel to provide light to the liquid crystal panel with a uniform distribution of light provided from the backlight; And A top cover which is engaged with a bottom cover in the backlight to protect the liquid crystal panel Includes, the backlight is One or more U-shaped lamps; A lamp housing in which the lamp is mounted; A side coupling member fastened to the lamp housing and having an insertion portion capable of inserting the lamp; And A lamp support member for supporting and fixing the lamp in the insertion portion of the side coupling member; The lamp support member, A plate disposed at an upper side or a lower side of the insertion unit and supporting the lamp in contact with an upper or lower end surface of the inserted U-shaped lamp; And Protrusion formed in the center of the plate Liquid crystal module comprising a. delete The method of claim 9, The plate is a liquid crystal module, characterized in that the tension bar having an elastic force. The method of claim 11, And the plate supports the lamp by providing tension to both sides of the lamp with the projection as a support shaft with respect to the inserted U-shaped lamp. The method of claim 9, The projection is a liquid crystal module, characterized in that formed integrally with the plate. The method of claim 9, The U-shaped lamp is a liquid crystal module, characterized in that the lamp is inserted and fixed between the upper wall or the lower wall of the insertion portion of the support member and the side coupling member.

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